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from typing import Union, Tuple, overload, ByteString, Optional
class ChaCha20Poly1305Cipher:
nonce: bytes
def __init__(self, key: ByteString, nonce: ByteString) -> None: ...
def update(self, data: ByteString) -> None: ...
@overload
def encrypt(self, plaintext: ByteString) -> bytes: ...
@overload
def encrypt(self, plaintext: ByteString, output: Union[bytearray, memoryview]) -> None: ...
@overload
def decrypt(self, plaintext: ByteString) -> bytes: ...
@overload
def decrypt(self, plaintext: ByteString, output: Union[bytearray, memoryview]) -> None: ...
def digest(self) -> bytes: ...
def hexdigest(self) -> str: ...
def verify(self, received_mac_tag: ByteString) -> None: ...
def hexverify(self, received_mac_tag: str) -> None: ...
def encrypt_and_digest(self, plaintext: ByteString) -> Tuple[bytes, bytes]: ...
def decrypt_and_verify(self, ciphertext: ByteString, received_mac_tag: ByteString) -> bytes: ...
def new(key: ByteString, nonce: Optional[ByteString] = ...) -> ChaCha20Poly1305Cipher: ...
block_size: int
key_size: int
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